四年级下册 运算律（笔算）
姓名：_______________
学号：_______________
用时：_______________
| 97 × 2 = 100 × 2 - __ × 2 | 96 × 7 = (100 - __) × 7 |
| (11 + 12) × 7 = 77 + __ | (12 + 14) × 4 = 48 + __ |
| (2 + 10) × 7 = 14 + __ | 96 × 3 = (100 - __) × 3 |
| 11 + 19 + 22 = (11 + __) + 22 | (12 + 7) × 9 = 108 + __ |
| 20 + 26 + 1 = (20 + __) + 1 | 16 + 30 + 17 = (16 + __) + 17 |
| 71 + 70 = 70 + __ | 21 × 5 = 5 × __ |
| 19 + 51 = 51 + __ | 14 × 5 = 5 × __ |
| 29 × 3 = 3 × __ | 77 + 76 = 76 + __ |
| 41 + 25 + 5 = (41 + __) + 5 | 97 × 9 = (100 - __) × 9 |
| (10 + 4) × 3 = 30 + __ | 63 + 58 = 58 + __ |
| 82 × 5 = 5 × __ | 98 × 2 = 100 × 2 - __ × 2 |
| 34 + 10 + 35 = (34 + __) + 35 | 96 × 5 = 100 × 5 - __ × 5 |
| 65 + 77 = 77 + __ | 84 × 5 = 5 × __ |
| (18 + 10) × 9 = 162 + __ | 27 + 6 + 3 = (27 + __) + 3 |
| 56 + 92 = 92 + __ | 70 × 5 = 5 × __ |
| 98 × 7 = (100 - __) × 7 | 82 + 56 = 56 + __ |
| (6 + 7) × 9 = 54 + __ | 12 + 64 = 64 + __ |
| 68 × 8 = 8 × __ | 98 × 4 = 4 × __ |
四年级下册 运算律（笔算）（答案）
姓名：_______________
学号：_______________
用时：_______________
| 97 × 2 = 100 × 2 - __ × 2 3 | 96 × 7 = (100 - __) × 7 4 |
| (11 + 12) × 7 = 77 + __ 84 | (12 + 14) × 4 = 48 + __ 56 |
| (2 + 10) × 7 = 14 + __ 70 | 96 × 3 = (100 - __) × 3 4 |
| 11 + 19 + 22 = (11 + __) + 22 19 | (12 + 7) × 9 = 108 + __ 63 |
| 20 + 26 + 1 = (20 + __) + 1 26 | 16 + 30 + 17 = (16 + __) + 17 30 |
| 71 + 70 = 70 + __ 71 | 21 × 5 = 5 × __ 21 |
| 19 + 51 = 51 + __ 19 | 14 × 5 = 5 × __ 14 |
| 29 × 3 = 3 × __ 29 | 77 + 76 = 76 + __ 77 |
| 41 + 25 + 5 = (41 + __) + 5 25 | 97 × 9 = (100 - __) × 9 3 |
| (10 + 4) × 3 = 30 + __ 12 | 63 + 58 = 58 + __ 63 |
| 82 × 5 = 5 × __ 82 | 98 × 2 = 100 × 2 - __ × 2 2 |
| 34 + 10 + 35 = (34 + __) + 35 10 | 96 × 5 = 100 × 5 - __ × 5 4 |
| 65 + 77 = 77 + __ 65 | 84 × 5 = 5 × __ 84 |
| (18 + 10) × 9 = 162 + __ 90 | 27 + 6 + 3 = (27 + __) + 3 6 |
| 56 + 92 = 92 + __ 56 | 70 × 5 = 5 × __ 70 |
| 98 × 7 = (100 - __) × 7 2 | 82 + 56 = 56 + __ 82 |
| (6 + 7) × 9 = 54 + __ 63 | 12 + 64 = 64 + __ 12 |
| 68 × 8 = 8 × __ 68 | 98 × 4 = 4 × __ 98 |